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Bio 103 Exam #4
Portland State Biology 103
133
Biology
Undergraduate 1
05/23/2011

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Term
Plant hormones can be defined as ….

1. Substances that are produced once plants reach sexual maturity.
2. Substances that are produced by cells in one location and are transported to another locations
where they have specific effects.
3. Substances that make plants grow faster.
4. Substances that increase the plant’s desire to reproduce.
5. Substances that are produced in "plant glands."
Definition
2. Substances that are produced by cells in one location and are transported to another locations
where they have specific effects.
Term
Gravitropism refers to …

1. Auxins cause the elongation of cells on one side of the stem in response to light.
2. Gibberellins cause the elongation of cells on one side of the stem in response to gravity.
3. Cytokinins are produced in the roots and inhibit the elongation of lateral buds on the stem.
4. Plants grown in space display random growth because of the lack of gravity.
5. Stems grow up and roots grow down.
Definition
5. Stems grow up and roots grow down.
Term
Movement of water from roots to leaves
is driven by ...

1. Transpiration
2. The cohesion-tension theory
3. Diffusion
4. Stomata
5. Active transport
Definition
1. Transpiration
Term
Is global warming good for plants?

1. Yes, they will grow better because they will get more light.
2. Yes, they will grow better because they will get more water.
3. Yes, they will grow better because they will get more carbon dioxide.
4. Yes, they will grow better because all the animals will die, which will help fertilize them.
Definition
3. Yes, they will grow better because they will get more carbon dioxide.
Term
What is the purpose of the casparian strip?
1. It keeps unwanted and harmful substances outside of the vascular system.
2. It seals off the vascular tissue so pressure can force water up the stem.
3. It prevents phloem sap from entering the root cortex.
Definition
1. It keeps unwanted and harmful substances outside of the vascular system.
Term
Are mycorrhizal fungi and nitrogen fixing bacteria slaves to the plant? What do they get out of the relationship?

1. Yes, they are like slaves – they don’t get anything.
2. No, they get oxygen.
3. No, they get sugar for growth.
4. No, they get chlorophyll.
5. No, they nutrients.
Definition
3. No, they get sugar for growth.
Term
The local fraternity had a contest- who could
drink beer through a 20 foot-long straw from
the top of the building. Nobody could do it!
So, how does a tree get water up a stem that
is 200 feet tall?

1. Roots are under high pressure so the water is pumped upwards.
2. The same as a short plant- the leaves on a tall tree just have to apply that much more tension (they have to suck harder!).
Definition
2. The same as a short plant- the leaves on a tall tree just have to apply that much more tension (they have to suck harder!).
Term
What is the main function of leaf
veins?
1. To support the leaf.
2. To protect against herbivores.
3. To transport water and sugar.
4. To absorb carbon dioxide.
5. To store starch.
Definition
4. To absorb carbon dioxide.
Term
Would the mycorrhizae be a source or a
sink?
1. Source.
2. Sink.
3. Neither- they do not use or make sugar.
Definition
2. Sink
Term
When you left for spring break you accidentally knocked over your house plant so it was laying on its side for a week. When you return you decide to be nice and repot it- what strange thing would you notice about the roots when you take it out of its pot?
1. The roots have died.
2. The roots have started growing towards the top side of the pot.
3. The roots have started growing towards the bottom side of the pot.
4. The roots have turned green and started to sprout leaves.
5. Nothing is strange about the roots.
Definition
3. The roots have started growing towards the bottom side of the pot.
Term
You want to make the world champion pumpkin that will be larger than any pumpkin ever produced. What should you do?
1. Give the plant lots of fertilizer.
2. Give the plant lots of sun.
3. Remove all the developing fruits except for one.
4. Treat the developing pumpkin with Auxin.
5. All of the above.
Definition
5. All of the above.
Term
About to head out to meet friends, your mom says “Don’t forget to mow the lawn before you go.” But, you just mowed it last week…. Thinking quickly, you draw on your new knowledge from biology to make a solid argument: “Mom, if I mow the lawn too often it will just grow faster because….”
1. Increased auxin production in shoots will stimulate shoot growh.
2. Decreased auxin production in shoots will allow cytokinins from roots to stimulate shoot growth.
3. Increased cytokinin production in roots will inhibit auxin production.
4. Decreased cytokinin production in roots will allow shoot growth stimulation by auxins.
“…. so mowing it too often is a waste of energy.”
Definition
2. Decreased auxin production in shoots will allow cytokinins from roots to stimulate shoot growth.
Term
Charles Darwin and his son Francis
asked the same question more than
100 years ago. What is a good
hypothesis to test to get at this
mechanism?
1. The plant is responding to heat -One
side of the plant is heated by the
sunlight more than the other causing it
to bend.
2. The plant is responding to light – the
dark side of the stem grows faster
causing the stem to bend towards the
light.
3. Both of these are reasonable
hypotheses
Definition
3. Both of these are reasonable
hypotheses
Term
[image]
Definition
1. All three treatments will grow towards the light.
Term
[image]
Definition
3. Only the control and the clear cap will grow towards the light.
Term
You’re giving some advice to your friend on how to care for his
“special plant.” He wants it to bush out more to produce
more “buds.” So, drawing on your knowledge from biology
you tell him, “Dude, you need to snip the apical bud…..”
1. To reduce auxin concentration in the stem, which will allow cytokinins to stimulate lateral buds.
2. To stimulate cytokinin production in the roots, which will stimulate lateral buds.
3. To stimulate auxin concentration in the stem, which will stimulate lateral buds.
4. To reduce cytokinin production in the roots, which will stimulate lateral buds.
Definition
1. To reduce auxin concentration in the stem, which will allow cytokinins to stimulate lateral buds.
Term
Double fertilization in Angiosperms
results in …..
1. Twin zygotes.
2. A zygote and a triploid endosperm.
3. A triploid zygote.
4. A megaspore mother cell.
5. Endosperm and a megaspore.
Definition
2. A zygote and a triploid endosperm.
Term
Angiosperm reproduction differs from
Gymnosperms and ferns….
1. They have flowers.
2. They often rely on insects for pollination.
3. Ovules are enclosed in a carpel (ovary).
4. The have double fertilization and a triploid endosperm.
5. All of the above are true.
Definition
5. All of the above are true.
Term
Microspores develop into …..
1. Pollen.
2. Ovules.
3. Endosperm.
4. Embryos.
5. Megaspores.
Definition
1. Pollen
Term
Help! You have to make guacamole for your party tomorrow but all the avocados you can find are hard as a rock. What should you do?
1. Give up and just make onion dip.
2. Coat the avocadoes with auxin.
3. Coat the avocadoes with cytokinin.
4. Put the avocadoes in a plastic bag with a ripe banana overnight.
5. Cook the avocadoes in the microwave.
Definition
4. Put the avocadoes in a plastic bag with a ripe banana overnight.
Term
You have a nice little plant on the windowsill that opens a new flower every morning when you wake up. The city recently installed a street light that is on all night right outside your window. What do you think will happen to the plant?
1. It will start making 2 flowers every morning.
2. It will lose all of its phytochromes.
3. It will become etiolated.
4. It will start to flower at different times of the day.
5. It will stop flowering.
Definition
4. It will start to flower at different times of the day.
Term
A pair of identical twins were separated at birth. One was raised in a “sporty” family. She played basketball in college and eventually became a WNBA star. The second was raised in a “bookish” family. She got her medical degree and became a neurosurgeon. This is an example of…
1. Genotype variation.
2. Phenotypic plasticity.
3. Mutation.
4. Growth hormone variation.
5. Poor parenting.
Definition
2. Phenotypic plasticity.
Term
Pollen is produced in the….
1. Receptacle.
2. Ovary.
3. Stigma.
4. Anthers.
5. Style.
Definition
4. Anthers.
Term
An artichoke is a composite flower, so what part of the flower is the artichoke heart?
1. Sepals.
2. Petals.
3. Stem.
4. Receptacle.
5. Ovary.
Definition
4. Receptacle.
Term
What is the correct order from outside in? Give the order by entering a series of four letters (e.g., 3124).
Definition
4321
Term
What part of the carpel is haploid?
1. Stigma.
2. Style.
3. Ovary.
4. Ovule.
5. Embryo sac.
Definition
5. Embryo sack
Term
Pollination helps the plant reproduce, so what does the bee get out of it?

1. Satisfaction from being a helper to plants.
2. Food – nectar.
3. Food – pollen.
4. Food – nectar and pollen.
5. Food – they eat the petals.
6. A place to hide.
Definition
4. Food – nectar and pollen.
Term
Pollen allergies – what type of pollination
syndrome does the pollen mostly come
from?
1. Wind-pollinated flowers.
2. Water-pollinated flowers.
3. Bee flowers.
4. Fly flowers.
5. Bird flowers.
Definition
1. Wind-pollinated flowers.
Term
Why are bee flowers hardly ever red?

1. Red makes bees angry.
2. Bees cannot see the color red.
3. Bees are afraid of humming birds.
4. Bee flowers ARE usually red- this is a trick question!
5. The FCC allocated the color spectrum to
different pollinators and the bees lost out on the red spectrum.
Definition
2. Bees cannot see the color red.
Term
Why do Angiosperms often have colorful
and showy flowers?
1. It makes us happy.
2. It makes our mothers and girlfriends
happy.
3. They need to attract insects and birds for pollination.
Definition
3. They need to attract insects and birds for pollination.
Term
What pollinates this
plant? -corn-
1. Bees
2. Flies
3. Beetles
4. Birds
5. Bats
6. Butterflies
7. Wind
8. Water
Definition
8. Wind
Term
The endosperm of the seed….
1. Is the same as the cotyledons
2. Is the triploid nutritive tissue of the seed
3. Is a special diploid tissue that protects the
embryo
4. Is the sperm that fertilizes the egg cell
5. None of the above
Definition
2. Is the triploid nutritive tissue of the seed
Term
The seed develops from …..
1. The ovary
2. The stamen
3. The petals
4. The ovule
5. None of the above
Definition
4. The ovule
Term
Animals with radial symmetry include…
1. The Cnidarians
2. The Chordates
3. The Echinoderms
4. Both 1 and 2
5. Both 1 and 3
6. Both 2 and 3
Definition
5. Both 1 and 3
Term
What can we say about plant-pollinator mutualisms?
1. Plants benefit by having their pollen dispersed to
flowers of the same species.
2. Plants have to trick or bribe insects to transfer their
pollen.
3. Pollinators benefit by having a food source.
4. Pollinators collect both pollen and nectar for food.
5. All of the above.
Definition
5. All of the above.
Term
Mating in most plants differs from mating in most animals….
1. Plants need to avoid self fertilization.
2. Plants have a multicellular gamete stage.
3. Plants have to utilize animals or abiotic
vectors to effect pollination.
4. Animal pollinated plants have to trick pollinators or provide them with food.
5. All of the above.
Definition
5. All of the above.
Term
What part of the seed is most of the peanut?
1. Embryo.
2. Endosperm.
3. Integument.
4. Cotyledons.
5. Embryo sac.
6. Ovule.
7. Zygote.
Definition
4. Cotyledons
Term
Lots of things we call vegetables are actually
fruits. How can you tell if a vegetable is
truly a fruit or a different part of the plant?
1. Fruits are always brightly colored.
2. Fruits will have flower parts left on them.
3. Fruits will usually have seeds.
4. Fruits will always be sweet.
Definition
3. Fruits will usually have seeds.
Term
Why do you think fleshy fruits often change to
bright colors when they are ripe?
1. The color attracts animals for seed dispersal.
2. Colors are more effective at absorbing heat from the sun for fruit development.
3. If the animals ate the green fruit the seeds would not
be fully developed yet.
4. Both 1 and 2 are true.
5. Both 1 and 3 are true.
6. Both 2 and 3 are true.
Definition
5. Both 1 and 3 are true.
Term
List the characteristics of Annelids:
1. Protostome
2. Deuterstome
3. Radial symmetry
4. Bilateral symmetry
5. Incomplete gastrulation
6. No digestive track
7. Digestive track present
Definition
1,4,7
Term
What trait do the Chordates and
Echinoderms have in common?
1. They both have a notochord.
2. They both develop a mouth from the
second opening of the gastrula
3. The both develop an anus from the second opening of the gastrula
4. They both have radial symmetry.
5. None of the above.
Definition
3. The both develop an anus from the second opening of the gastrula
Term
Where is the receptacle? What grows off of it?
Definition
The expanded tip of a flower stalk or axis that bears the floral organs or the group of flowers in a head
Term
What is the Sepal?
Definition
modified lead of a flowering plant
Term
What is the petal of a flower?
Definition
modified leaf of a flowering plant. Often the colorful parts of lower that advertise pollinators
Term
What is the stamen?
Definition
a pollen-producing male reproductive part of a flowering consisting of a
filament and an anther
Term
What is the anther? where is it located? male/female?
Definition
sac in which pollen grains develop, located at the tip of the flower
stamen male part
Term
What is the filament?
Definition
stalk of the anther
Term
What is the carpel? Male/female?
Definition
female part of the flower, consisting of a stalk with an ovary at the base and
a stigma which traps pollen at the tip.
Term
Describe the stigma, what does it do?
Definition
sticky tip of a flowers carpel( traps pollen grains)
Term
What is the Ovary?
Definition
basal portion of a carpel in which the eggs-containing ovules develop
Term
what does the style do?
Definition
supports the stigma
Term
What is pollen? male/female?
Definition
the structure that will produce the sperm in seed plants: male gametophyte
Term
Describe the egg cell, what is produced from it?
Definition
Each ovule contains egg cells and when the cells join with pollen cells a seed
is produced
Term
What is the Embryo sac? what does it contain?
Definition
female gametophyte; contained in the ovule
Term
what is a Composite flower?
Definition
many small flowers in one head ex sunflowers
Term
What is the Megaspore mother cell? What comes from it, 1n or 2n?
Definition
Diploid cell(2n) occurs in meiosis
Results in four megaspores female
Term
What is the Microspore mother cell? 2n or 1n?
Definition
it is Four male Mircrospores; 2n
forms the pollen grains in male plants
Term
Double fertilization
Definition
-flowering plant formation of both a zygote and a cell with a triploid nucleus which develops into endosperm
-zygote
-endosperm
Term
Generative cell
Definition
anthridia are reduced to these within the pollen grain, it divides and gives rise to two sperm nuclei
Term
Microspores
Definition
4 are made -> pollen grain
Term
Sperm Cells
Definition
grow within the mature pollen grain; in fertilization they fuse with 2 polar nuclei
Term
Tube cell nucleus
Definition
the third nuclei, and the 3 of them make up the early form of the gametophyte
Term
Pollen tube
Definition
develops from the inner wall of the pollen grain and grows toward the ovule
Term
Sperm + egg =
Definition
Zygote
Term
sperm + 2 polar nuclei = ?
Definition
endosperm nucleus
Term
What is abiotic pollination?
Definition
where pollination is mediated without hte involvement of other organisms
-wind
-water surface
-submerged
Term
What are examples of pollinator mutualisms?
Definition
-bees
-pollen flies
-carrion flies
-birds
-bats
-butterflies
-beetles
-moths
Term
Explain the relationship between Bees and flowers!
Definition
Flowers blue yellow
Bilateral symmetry
Complex floral mechanisms
Pollen and nectar rewards
scented
Term
Explain the relationship between flies and flowers!
Definition
white flowers
sometimes trap flowers
sweet scent
Term
Explain the relationship between birds and flowers!
Definition
humming birds ( red or yellow flowers)
tubular corolla
lots of nectar
no scent
Term
Explain the relationship between bats and flowers!
Definition
yellow or white flowers
• night flowering
• lots of nectar
• strong sweet scent
Term
Explain the relationship between beetles and flowers!
Definition
open bowl shaped flowers
pollen
Term
Explain the relationship between moths and flowers!
Definition
night flowering
yellow or white flowers
strong scent
long flower tube
nectar
Term
Explain the relationship between butterflies and flowers!
Definition
landing platform and tubular
blue, white or yellow flowers
nectar
scent not important
Term
what are the characteristics of a generalist?
Definition
sunflower family
nectar or/and pollen
maybe scented
yellow or white
appeal to many different types of pollinators
Term
what is copulation pollination?
Definition
orchid flowers look/smell like female wasps
orchids have no nectar or pollen as rewards for bees
orchids attract male bees
Term
what is outcrossing?
Definition
mating between plants of same species
flowers are large and conspicuous
Term
what is selfing?
Definition
mating within the same plant

flowers are small
Term
Describe fleshy fruits
Definition
develop from ovary wall
animal dispersal
endosperm may remain intact to seed maturation (corn)
Term
describe dry fruits
Definition
wind, water or gravity dispersal
Term
Describe active transport!
Definition
Into root hair- uses energy of ATP to transport minerals into roots
ex:
-into vascular tissue
Term
What is diffusion?
Definition
the movement of a substance to move down its concentration gradiet from where it is more concentrated to where it is less concentrated

Ex:
-diffusion to xylem
-diffusion through cytoplasm
Term
Cytoplasm
Definition
everything inside the plasma membrane
Term
explain the relationship between mycorrize and roots
Definition
-Symbiotic relationship between fungal strands that attach to roots
-Aid in absorption of nutrients and water
-Receives sugars and amino acids from plant
-Important in nutrients cycling in all ecosystems
Term
Explain the relationship between N fixing bacteria and plants!
Definition
Root nodule- bacteria’s home and where they fix nitrogen into a form that is usable by plant
• Some plants capable of forming nitrogen fixing (legumes)

Lack of nitrogen limits plant growth
Term
What is the Endodermis?
Definition
layer of cells that create a waterproof substance for the plant.
Term
What does the leaf blade do?
Definition
• Intercepts sunlight
Term
What are Palisade cells?
Definition
• Cells found in leaves which contains chloroplast
• Helps with photosynthesis to convert large amounts of light to be
absorbed
• Located near the upper surface of the leaf
Term
what does the stoma do?
Definition
• CO2 enters
• Can open or close in response to water availability
Term
what is the function of leaf veins?
Definition
Water and sugar transport through the veins
Term
what is the Pressure-flow theory/ sugar transport?
Definition
• Sugar transport by differences in pressure
• Sieve tube loaded by active transport
• Osmosis out of phloem to sink
Term
what is a sink? a source?
Definition
Source, where sugars are stores(leaves) to the sink where sugars are used (apical meristems, roots and developing
fruit)
Term
What is Phenotypic plasticity?
give me an example bitch!
Definition
an individuals ability to change phenotype in response to local environmental conditions

Ex: leaves in the sun are thin and small. leaves in the Shade are large and thick
Term
Module?
Definition
repeating units that can function semi-automously in many ways
Term
what is Gravitropism?
Definition
- plants growth in response to gravity
Term
what is Phototropism?
Definition
growth of a plant shoot toward(positive) or away( negative)
from light
Term
what is a phytochrome?
Definition
Set biological clock for plants
• shading by other plants produce longer stems an adaptation for
competition
• short days: plants flower/ germinate in fall
• long days: flower/germinate in spring
Term
what does Auxin do?
Definition
promotes seedling elongation
Produced in shoots
Inhibit lateral bud growing into new stems
Stimulate root grown
Term
what does Abscisic Acid do?
Definition
• Inhibits cell division and promotes dormancy
-inhibits the effects of other hormones
• interacts with gibberellins in regulating seed germination
• keeps stoma closed
Term
what are Gibberellins?
Definition
triggers germination of seeds and interacts with auxins in regulating growth and fruit development
Term
what are Cytokinins?
Definition
• Produced in roots
• Inhibit root branching
• Stimulate lateral bud growth in shoot
Term
What is Ethylene? what does it do?
Definition
Volatile gas
Fruit ripening
Abscission of leaves and fruits
Term
Describe Metazoans!
Definition
• Animal kingdom
• Closest relatives fungi and Protista
• Chordates- notochord(one hole)
• Deuterostomes- (two holes)
• Diversified in cambrain
• Includes 30 living phyla
• Multicellular
• Heterotrophic-cannot make own organic food
• Reproduce sexually
• Lack cell walls
• Motile at some stage of life cycle
• Rapid responses to external stimuli
Term
Who exhibits radial symmetry?
Definition
• Anemones
• Cnidaria
• enchinoderms
Term
WHo exhibits bilateral symmetry?
Definition
• Organism divided by single cut equally mirror image
• Flatworms
• Platyhelminthes
• metazoans
-humans
Term
Describe Platyhelminthes!
Definition
aka Flatworms!
• cephalization
• ganglia
• nerve cords
• parasites- tape worm, flukes
• organs
Term
what is cephalization?
Definition
nervous system near the head end
Term
what is a ganglia?
Definition
-forms brain, nerve cell bodies in centralized nervous system
Term
what is a nerve cord?
Definition
axons and dendrites extending from brain
Term
What is Gastrulation?
Definition
phase of embryonic development that transforms blastula .
adds more cells to embryo in layers
Term
Examples of animal evolutions!
Definition
Tissues
o Similar cells grouped together.
Body symmetry
o Dorsal and ventral surfaces (top/bottom)
o Radial or bilateral symmetry
Cephalization
o Concentration of neural tissue into one end (the head)
Term
what are germ layers?
Definition
embryonic tissue layers
Term
what does the Endoderm become?
Definition
becomes the gut.
Term
What does the Ectoderm become?
Definition
the skin.
Term
What does the mesoderm form?
Definition
o forms between the endoderm and ectoderm.

o Develops into muscle, organ, skeletal, and circulatory systems.
Term
Basic traits of Porifera?
Definition
• Lack of true tissues
• Filter feeders
• 3 types of cells- epithelia, collar, amoeboid cell

•asexual reproduction by budding- self recognition
Term
What are Cnidarias?
Definition
-jellyfish and jellies
-have stingers for catching prey
• two layers- endoderm, ectoderm. No true muscles
• incomplete gastrulation- single opening
Term
Describe Platyhelminthes!
Definition
-aka Flatworms
-bilateral symmetry
-cephalization
-nervous system
parasites: tapeworks and flukes
Term
Describe the Nematoda!
Definition
-aka round worms
• abundant and diverse
• hydrostatic skeleton
• one-way digestive path
• organs, nervous system
• decomposers
• body is biometrical and head is radial
• parasities- hookworms, trichinella
Term
Describe Annelida!
Definition
aka segmented worms
• segmentaion
• closed circulatory
Digestive tract-Pharynx
Decomposers (earthworms)
Polychaetes- Leeches
Term
What makes up Anthropods?
Definition
-Insects
-Arachnids
-Crustaceans
Term
Traits of Anthropods?
Definition
Most abundant-Esp. insects
Exoskeleton- Chitin, Molting , Size limits
Segmentation
Term
Describe Insects!
Definition
-Six legs and four wings.
-Flies have two wings
-Gas exchange through tracheae
-Compound eyes.
-Metamorphosis-Larva, Pupa, Incomplete metamorphosis
Term
Describe Arachnids!
Definition
-Eight walking legs
-Spiders, mites, ticks, and scorpions
-Breath through tracheae or book lungs.
-Simple eyes- eight of them
-Predators and parasites.
-Some have venom
Term
Describe Crustaceans!
Definition
-Crabs, lobsters, shrimp.
-Compound eyes
-Respire via gills
-Aquatic (mostly)
Term
Traits of Mollusks
Definition
o Hydrostatic skeleton
o Open circulatory system
o Mantle-secretes shell (calcium carbonate) and Gill chamber
Snails and slugs (Gastropods)
o Crawl on one “foot”
o Radula – scraping food.
Term
what are Bivalves?
Definition
o Hard shell that forms two halves
o Mussels, clams, oysters
o Filter feeders
Term
Describe Cephalopods!
Definition
aka -Octopuses and squid
o Predators
o Jet propulsion
o Modified foot – tentacles
o Closed circulation
o Relatively large brain
Term
Describe Echinoderms!
Definition
-Sea stars, urchins, and sea cucumbers
-Endoskeleton
o Spines or knobs extend through the skin
-Mobile
o Tube feet
o Water vascular system
-Simple nervous system
-Deuterostomes
-Radial symmetry
o Bilateral in their free-swimming larvae
Term
WHo has Bilateral symmetry?
Definition
platyhelminthes
metazoans
humans
Term
who has radial symmetry?
Definition
cnardians
echinoderms
anemones
Term
who are deuterstomes?
Definition
chordates
echinoderms
Term
is an annelids a protosome or deuterostome?
Definition
protostome
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